Add time:08/29/2019         Source:sciencedirect.com

This review provides a comprehensive overview of the most recent progress in chemistry and applications of metal complexes containing heteroallylic ligands such as amidinates and guanidinates. Clearly, the coordination chemistry of amidinates and guanidinates has reached a state of maturity and continues to be a highly popular area of research. These heteroallylic ligand systems allow a wealth of variations and modifications, making a larger ligand library available than in cyclopentadienyl chemistry. Exciting results have been obtained in recent years for almost any metallic elements in the Periodic Table. Truly remarkable developments include, for example, the chemistry of cyclic amidinate-based silylenes and the stabilization of metal–metal quadruply and quintuple bonds by amidinate and guanidinate ligands. The range of applications for metal amidinates and guanidinates in homogeneous catalysis has considerably broadened in recent years. In materials science, alkyl-substituted metal amidinates and guanidinates are now well established as volatile precursors for a variety of ALD and MOCVD processes. Without doubt the chemistry of metal amidinates and guanidinates and related complexes will continue to produce exciting results and applications in the years to come.

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